content/canvas/test/webgl-conformance/conformance/glsl/samplers/glsl-function-texture2d-bias.html@6474c204b198
content/canvas/test/webgl-conformance/conformance/glsl/samplers/glsl-function-texture2d-bias.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!--
2 Copyright (c) 2011 The Chromium Authors. All rights reserved.
3 Use of this source code is governed by a BSD-style license that can be
4 found in the LICENSE file.
5 -->
6 <!DOCTYPE html>
7 <html>
8 <head>
9 <meta charset="utf-8">
10 <title>WebGL texture2D GLSL conformance test.</title>
11 <link rel="stylesheet" href="../../../resources/js-test-style.css"/>
12 <link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/>
13 <script src="../../../resources/js-test-pre.js"></script>
14 <script src="../../resources/webgl-test.js"> </script>
15 <script src="../../resources/webgl-test-utils.js"> </script>
16 </head>
17 <body>
18 <canvas id="example" width="256" height="256" style="width: 16px; height: 16px;"></canvas>
19 <div id="description"></div>
20 <div id="console"></div>
21 <script id="vshader2d" type="x-shader/x-vertex">
22 attribute vec4 vPosition;
23 attribute vec2 texCoord0;
24 varying vec2 texCoord;
25 void main() {
26 gl_Position = vPosition;
27 texCoord = texCoord0;
28 }
29 </script>
30 <script id="fshader2d" type="x-shader/x-fragment">
31 precision mediump float;
32 uniform sampler2D tex;
33 uniform float bias;
34 varying vec2 texCoord;
35 void main() {
36 gl_FragData[0] = texture2D(tex, texCoord, bias);
37 }
38 </script>
39 <script>
40 description("tests GLSL texture2D function with bias");
42 var wtu = WebGLTestUtils;
43 var canvas = document.getElementById("example");
45 shouldBe("canvas.width", "256");
46 shouldBe("canvas.height", "256");
48 var gl = wtu.create3DContext(canvas);
49 var program = wtu.setupProgram(
50 gl, ['vshader2d', 'fshader2d'], ['vPosition', 'texCoord0'], [0, 1]);
51 wtu.setupUnitQuad(gl, 0, 1);
53 var colors = [
54 {name: 'red', color:[255, 0, 0, 255]},
55 {name: 'green', color:[0, 255, 0, 255]},
56 {name: 'blue', color:[0, 0, 255, 255]},
57 {name: 'yellow', color:[255, 255, 0, 255]},
58 {name: 'magenta', color:[255, 0, 255, 255]},
59 {name: 'cyan', color:[0, 255, 255, 255]},
60 {name: 'pink', color:[255, 128, 128, 255]},
61 {name: 'gray', color:[128, 128, 128, 255]},
62 {name: 'light green', color:[128, 255, 128, 255]},
63 ];
65 shouldBe("colors.length", "9");
67 var tex = gl.createTexture();
68 gl.bindTexture(gl.TEXTURE_2D, tex);
69 gl.texParameteri(
70 gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_NEAREST);
71 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
72 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT);
73 gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
75 for (var ii = 0; ii < colors.length; ++ii) {
76 var color = colors[ii];
77 var size = Math.pow(2, colors.length - ii - 1);
78 wtu.fillTexture(gl, tex, size, size, color.color, ii);
79 }
81 var loc = gl.getUniformLocation(program, "bias");
83 for (var ii = 0; ii < colors.length; ++ii) {
84 gl.uniform1f(loc, ii);
85 var color = colors[ii];
86 wtu.drawQuad(gl);
87 wtu.checkCanvas(
88 gl, color.color,
89 "256x256 texture drawn to 256x256 dest with bias = " + ii +
90 " should be " + color.name);
91 }
92 glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors.");
94 successfullyParsed = true;
96 </script>
97 <script>finishTest();</script>
99 </body>
100 </html>
